Hi All,

I'm using Geotools, and I need to convert coordinates between 2D and 3D 
coordinate reference systems. I recognize that there's no universally-correct 
way to do this: 2D -> 3D means "making up" a Z coordinate, and 3D -> 2D means 
losing information. But, is there some way to teach Geotools that, in my 
particular context, I want to use a specific transformation. E.g.:

+-----+                 +-----+
|     | --- Z = 15 ---> |     |
| 2D  |                 |  3D |
|     | <-- drop Z ---- |     |
+-----+                 +-----+
I know I can transform any particular coordinate manually this way, but I'd 
like to integrate it so this Just Works. e.g. I can do CRS.findMathTranform(a, 
b) and if a is convertible to my 2D CRS, and my 3D CRS is convertible to b, it 
works.

Is this possible?  

Thanks,
Eric


-- 
Eric W. Anderson                             Computer Science Department
ander...@cs.cmu.edu                           Carnegie Mellon University
phone: +1-412-268-1908                        Gates-Hillmann Center 6005

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